Results 1 to 10 of about 71,366,600 (306)
Understanding the dynamics of randomly positioned dipolar spin ensembles
Physical Review Research, 2023 Dipolar spin ensembles with random spin positions are attracting much attention because they help us to understand decoherence as it occurs in solid-state quantum bits in contact with spin baths. Also, these ensembles are systems which may show many-body
Timo Gräßer +3 more
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Field Theory of Quantum Antiferromagnets: From the Triangular to the Kagome Lattice [PDF]
International Journal of Modern Physics B, 1998 We analyse a family of models, that interpolates between the Triangular lattice antiferromagnet (TLAF) and the Kagome lattice antiferromagnet (KLAF). We identify the field theories governing the low energy, long wavelength physics of these models. Near the TLAF the low energy field theory is a nonlinear sigma model of a SO(3) group valued field.
Shubashree, D., Shankar, R.
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Microscopic Description of 2D Topological Phases, Duality, and 3D State Sums
Advances in Mathematical Physics, 2010 Doubled topological phases introduced by Kitaev, Levin, and Wen supported on two-dimensional lattices are Hamiltonian versions of three-dimensional topological quantum field theories described by the Turaev-Viro state sum models.
Zoltán Kádár +2 more
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Floquet engineering the band structure of materials with optimal control theory
Physical Review Research, 2022 We demonstrate that the electronic structure of a material can be deformed into Floquet pseudobands with arbitrarily tailored shapes. We achieve this goal with a combination of quantum optimal control theory and Floquet engineering.
Alberto Castro +4 more
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Low-energy structure of spiral spin liquids
Physical Review Research, 2022 In this paper we identify a previously unexplored type of topological defect in spiral spin liquids—the momentum vortex—and reveal its dominant role in shaping the low-energy physics of such systems.
Han Yan (闫寒), Johannes Reuther
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Physical Review X, 2016 The metal-insulator transition has been a subject of intense research since Mott first proposed that the metallic behavior of interacting electrons could turn to an insulating one as electron correlations increase.
Yuichi Otsuka +2 more
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Model of tunnelling through periodic array of quantum dots
ITM Web of Conferences, 2017 Several explicitly solvable models of electron tunnelling in a system of single and double two-dimensional periodic arrays of quantum dots with two laterally coupled leads in a homogeneous magnetic field are constructed.
Meynster Dmitry, Popov Anton, Popov Igor
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Valence Bonds in Random Quantum Magnets: Theory and Application to YbMgGaO_{4}
Physical Review X, 2018 We analyze the effect of quenched disorder on spin-1/2 quantum magnets in which magnetic frustration promotes the formation of local singlets. Our results include a theory for 2D valence-bond solids subject to weak bond randomness, as well as extensions ...
Itamar Kimchi, Adam Nahum, T. Senthil
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Code CFTs and topological matter
Journal of High Energy PhysicsIn this paper, we propose a novel framework for modeling topological phases of matter using code-based Narain conformal field theories (NCFTs). We show that the algebraic structure of the NCFTs naturally embeds into critical lattice quantum field theory,
E. H Saidi, R. Sammani
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Projective toric designs, quantum state designs, and mutually unbiased bases [PDF]
QuantumToric $t$-designs, or equivalently $t$-designs on the diagonal subgroup of the unitary group, are sets of points on the torus over which sums reproduce integrals of degree $t$ monomials over the full torus.
Joseph T. Iosue +3 more
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